Mycobiology

The Korean Society of Mycology (한국균학회)
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First Report of Dieback Caused by Lasiodiplodia theobromae in Strawberry Plants in Korea

  • Nam, Myeong Hyeon (Nonsan Strawberry Experiment Station, Fruit and Vegetable Research Center, Chungnam ARES) ;
  • Park, Myung Soo (School of Biological Sciences, Seoul National University) ;
  • Kim, Hyun Sook (Nonsan Strawberry Experiment Station, Fruit and Vegetable Research Center, Chungnam ARES) ;
  • Kim, Tae il (Nonsan Strawberry Experiment Station, Fruit and Vegetable Research Center, Chungnam ARES) ;
  • Lee, Eun Mo (Nonsan Strawberry Experiment Station, Fruit and Vegetable Research Center, Chungnam ARES) ;
  • Park, Jong Dae (Nonsan Agricultural Technology) ;
  • Kim, Hong Gi (Department of Applied Biology, Chungnam National University)
  • Received : 2016.08.30
  • Accepted : 2016.10.12
  • Published : 2016.12.30
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Abstract

Dieback in strawberry (Seolhyang cultivar) was first observed during the nursery season (June to September) in the Nonsan area of Korea in the years 2012 and 2013. Initial disease symptoms included dieback on runners, as well as black rot on roots, followed by wilting and eventually blackened, necrotic discoloration in the crowns of daughter plants. A fungus isolated from the diseased roots, runners, and crowns is close to Lasiodiplodia theobromae based on morphological characteristics. Analysis of a combined dataset assembled from sequences of the internal transcribed spacer and translation elongation factor 1- alpha genes grouped nine fungal isolates with the type strain of L. theobromae. The isolates showed strong pathogenicity on strawberry cultivars Kumhyang, Seolhyang, and Akihimae, fulfilling Koch's postulates. Based on these results, the pathogen responsible for dieback on strawberry plants in Korea was identified as L. theobromae.

Keywords

References

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